February 2000
Beginner to intermediate
406 pages
8h 5m
English
Content preview from Designing Effective Speech Interfaces
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Precision
The eighteenth law is Precision, which states: The interface will allow the users to perform a task exactly.
Human Factors
Users want to know that when they perform a task, it will be done accurately and the results will be correct.
Technology Considerations and Implications
Precision will go awry for three reasons:
- There are errors in the underlying code.
- The user and the computer have different expectations of the definition of a task or its outcome.
- There are errors during the interaction, such as speech recognition errors that lessen precision.
The first item—errors in the underlying code—is not directly related to the interface; however, the second and third issues are related. They must be addressed during the design process to minimize their occurrence and the negative effect on precision.
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